1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2016 Broadcom
4 *
5 * Common header for Broadcom mailbox messages which is shared across
6 * Broadcom SoCs and Broadcom mailbox client drivers.
7 */
8
9#ifndef _LINUX_BRCM_MESSAGE_H_
10#define _LINUX_BRCM_MESSAGE_H_
11
12#include <linux/scatterlist.h>
13
14enum brcm_message_type {
15 BRCM_MESSAGE_UNKNOWN = 0,
16 BRCM_MESSAGE_BATCH,
17 BRCM_MESSAGE_SPU,
18 BRCM_MESSAGE_SBA,
19 BRCM_MESSAGE_MAX,
20};
21
22struct brcm_sba_command {
23 u64 cmd;
24 u64 *cmd_dma;
25 dma_addr_t cmd_dma_addr;
26#define BRCM_SBA_CMD_TYPE_A BIT(0)
27#define BRCM_SBA_CMD_TYPE_B BIT(1)
28#define BRCM_SBA_CMD_TYPE_C BIT(2)
29#define BRCM_SBA_CMD_HAS_RESP BIT(3)
30#define BRCM_SBA_CMD_HAS_OUTPUT BIT(4)
31 u64 flags;
32 dma_addr_t resp;
33 size_t resp_len;
34 dma_addr_t data;
35 size_t data_len;
36};
37
38struct brcm_message {
39 enum brcm_message_type type;
40 union {
41 struct {
42 struct brcm_message *msgs;
43 unsigned int msgs_queued;
44 unsigned int msgs_count;
45 } batch;
46 struct {
47 struct scatterlist *src;
48 struct scatterlist *dst;
49 } spu;
50 struct {
51 struct brcm_sba_command *cmds;
52 unsigned int cmds_count;
53 } sba;
54 };
55 void *ctx;
56 int error;
57};
58
59#endif /* _LINUX_BRCM_MESSAGE_H_ */
60

source code of linux/include/linux/mailbox/brcm-message.h